<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

    <script>
        'use strict'
        const FanApp = {};
        FanApp.name = 'xiaofan'
        FanApp.add = function (a, b) {
            return a + b;
        }
    </script>
</head>
<body>

</body>
</html>